<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        //1，检测获取字符串长度 length
        var str = 'my name is pink'; //  15
        console.log(str.length);
        //2,字符串的拼接+
        console.log('沙漠' + '骆驼'); //字符串的沙漠骆驼
        console.log('pink老师' + '13'); //'pink老师13'
        console.log('pink' + 'true'); //pinktrue
        console.log(12 + 12); //24
        console.log('12' + 12); //'1212'
    </script>
</head>

<body>

</body>

</html>